Dust-guard for gyratory crushing and pulverizing machines.



- J. E. KENNEDY. DUST GUARD FOR GYRATORY CRUSHING AND PULVERIZING MACHINES.

' APP-LICATION FILED SEPT-19 1913.

1,176,834.- Patented Ma1'.28,1916

2 SHEETS-SHEET I y I 2 69,10 fl o I? A 5 J I J1 0M WWA M.

1. E. KENNEDY.

DUST GUARD F OR GYRATOHY CRUSHING AND PULVERIZING MACHINES. APPLICATION FILED SEPT. l9 1913.

1,176,834, Patented Mar. 28, 1916.

2 SHEET$SHEET 2.

we r L lli. JLL a mm bra-1121mm?) Specification of Letters Patent.

sigma! agaplicstion lllcd. Eliay 31, 1913, serial Mo. 770,833. ii-icicles and this application filed September To all 'wiw'm it may concern Be it known that I, JOSEPH E. Kansans, a citizen of the United States, and a resident of the borough of Manhattan, city, county, and fitate of New York, have invented certain new and useful Improvements in Dust- Gnardsfor Gyratory Crushing and Pillvez'izing Machines, of which the following is a specification. I The object of my invention is to afford eliective dust guard especially adapted to the requirements of the type of crushing and pulverizing mechanism in which the lower extremity of a gyratory shaft is journaled ina rotatable eccentric bearing, situated in an inclosing gearing chamber, said shaft carrying a truncated conical crusher headpositioned in an oppositely in clined concave crusher chamber from the lower portion of which the crushed and pulverizcd material ,escapcs above the gear chamber, as setforth in toy concurrent application No. 770,833,.filed May 31st, 19%, of Whiclrthe present application is a solidi vision.

ln tlus class of crushing mechanism the exclusion of dust fromt-he gear chamber, and particularly from the lower eccentric bearing situated therein, is an important factor in the successful and economical operation of the -apparatus,said eccentric bearing and the rotatable sleeve in which it is seated being accurately and delicately fitted, and requiring special protection from grit which would speedily render them, and I hence the machine, inefficient or useless. Heretofore dust guards have been used e circling the gyratory shaft and resting up n the edge. of the shaft aperture at tlic top of the gearchambcr, and upon the upper edge of the rotatable bearing sleeve, and. these dust guards have consisted of continuous annular one piece metallic collars bored out to fit the shaft. As these dust collars moved back and forth, traveling with the shaft,

steel against iron, it will be readily understood that in a short time they became sufliciently Worn to allow the dust to pass be- I tween the shaft and the top dust collar into the loss in capacity of the machine clue to.

diminished eccentricity. Furthermore the Serial 250. 750,785.

tons to as much as 350 getlier again would take at least a day and involve a cost or" fifiy dollars for-labor and material alone. v i

I obviate these difficulties and insure com sinuous and cficctive operation for "long periods of time by means of m present inventiomwliich consists essentially 1n the combination, with a gyratory crusher shaft ofa dust guard of the specific construction herein described and claimed, the dust guard lacing utilized to seal the shaft 0 ening at the top of the gear chamber, an the upper edge of the rotatable bearing sleeve as hereinafter more fully set forth, distinguisliin features being the making of the guard in two semi-circular sections grooved for the reception of an annular gasket, and also for transverse gasketssealing the abutting ends of said semi-circular sections, in conjunction with means for securing the parts together.

in the accompanying drawings, Figure 1,

is central vertical sectional elevation of the lower portion of a gyratory crusherillustrating the practical application of my invention; 2, is a sectiopaliview of the gyratory shaft showing "a top view of my improved dust guard; Fig. 3, an edge view ofthe dust guard; Eigni, a'sectional elevation taken upon plane of line iei Fig. 2;

Fig. an elevation of the inner side of one i of the segmental sections; Fig. 6, a sectional view of the y atory shaft and of the under side of the dust guard; Fig. 7, is a sectional elevation taken upon plane of line 'Z.

In the apparatus illustrated in the vdrawlogs the general arrangement and operation of the parts are substantially the same as in others of this type, consisting essentially of a truncated conical crush ng head a rigidly secured to the shaft A, and gyratc thereby in an oppositely inclined concave by which it is rotatably supported on the.

. lower casing or bottom plate g,a floating ring 7, being interposed between said annular flange 0 and the actual rest or seat {1 In order to exclude all dust from the Inbricant and operative parts to be protected thereby, I close the top of the sleeve c, and the top of the gear chamber h, by means of dust guards or collars M, M, of peculiar construction.

Instead of making the collar of a single piece of metal-bored out to fit the shaft A, as heretofore, 1 make it in two semi-circular sections m, m, which are bolted together around the shaft, so as to be applicable thereto or removable therefrom at any time without the need of disassociating the parts as heretofore. The abutting ends of the segments m, m, are formed with flanges m, m, for the bolts 11, n, and with grooves m m for the reception of the transverse packing strips 0, 0, which seal the joints and make them dust proof. The inner surface of each segment m, m, is also formed with a groove m m, for the reception of an annular packing 1 to bearagainst the shaft A, and prevent the passage of dust between it and the guard M. lhis split dust collar can be put in the machine after the shaft is in place so that if a dust collar should accidentally become broken or worn out, anew one could be put on without dismantling the machine. The intention is to insert in the gland m a ring of packing 9, that has a lesser inside diameter than the collar, with two transverse strips of packing 0, 0, set at ap n'oximately right angles to the circumferential packing, so that when the 'two parts are drawn together by the bolts, the circumferential packing is pressed har against the shaft, while the iron is some distance back, and the transverse packing is clamped between the two seams so that no dirt can pass between the shaft into the gear chamber, through the top dust collar or through the bottom dust collar into the eccentric hearing. The transverse gaskets a,

close the seams betweenthe adjacent metal parts of the ring sections where joined together. so that no dust or dirt can get through in this way. This method of packinn and attaching a dust collar above the eccentric not onlv positively excludes the dust, but it protects the POl'lZlOIl of the shaft between the shaft and the dust collar into the gear chamber,- and between the dust collar and. the shaft into the eccentric bearing chamber. This insures long life tothe eccentric without heating, and a diminished amount of power required to operate with a uniform movement of the shaft, which means an increased tonnage, for, as the eccentricity of awrusher is diminished, the tonnage, or capacity of the machine isdiminished in proportion.

Provision is made for the lubrication of the lower bearing surfaces, 810., as set forth in my aforesaid concurrent application No. 770,833, or in any other manner that may be found expedient.

It is to be noted that my special construction of dust guard is hood-shaped in general configuration, the upper surfaces being all curved andinclined downward and the peripheral edge being in the form of a pcndent apron m extendingmelow the central under bearing surface 412., which letter i% made broad enough to enable the dust guard,

while contacting with the top of the sleeve 6, and the neck in, of the gear chamber h, to conform freely to the gyratory motion of the parts. By this hood-like structure the dustand grit is shed downward away from the contacting surfaces, and is' thus prevented from working in between the same. It is also to be noted that the only contact between the gyratory shaft A, and the dust guard is through the medium of the annular packingq, which spaces the inner edges of the segments'm, m, away from the shaft so that they cannot wear upon the latter;

and that the transverse gaskets 0, 0,- efiectually seal and render dust-proof the-joints between the halves of the dust guard.

The dust guard constructed as herein set forth is obviously adapted only to the special requirements of a gyratorycrusher of the class designated, and I do not seek to cover it for any other purpose or use.

What I claim as my invention and desire d to secure by Letters Patent is,

1. In crushing mechanism of the character designated, the combination with the gyratory shaft and dust guard support, of a segmental dust guard, an annular packing seated therein, transverse packing seated in grooves in the abutting ends thereof and underneath said annular packing, and means for uniting the segments of the guard, for the purpose set. forth.

In crushing mechanism of the character designated, the combination with the gyratory shaft and dust guard support, of

an encircling dust guard comprising two inverse semi circular segments the inner 1, naesa i faces of which are grooved forethe reception of an annular packing for contacting with the shaft, and the abutting ends of which are recessed for the reception of packing, both annular and transverse packings, said annular and transverse packing, the transverse packing being positioned below the an nular packing, and means for detachably uniting said abutting ends of the semi-circular segments, as and for the purpose described.

3. In crushing mechanism of the charac ter designated, the combination with the gyratory shaft and dust guard support, of a segmental hood-shaped .dust guard formed with a fiat lower contact surface surrounded .by pendent peripheral apron, and comprising two inverse semi-circular segments the inner faces of which are grooved for the reception of an annular packing for contacting with the shaft, and the abutting ends of which are recessed for the reception of packing both annular and transverse, said annular and transverse packing, the transverse packing being positioned below the annular packing, and means for detachably uniting said abutting ends of the semi-circular segments, as and for the purpose described.

JOSEPH E. KENNEDY. Witnesses GEO. NM. Minter, DOROTHY L. Mum. 

